Surely the calibration technique depends on what or how you are trying to measure?If you are measuring actual values of vacuum, then it's important to get them zeroed properly.If however you're just trying to balance them, it doesn't matter whether the needle starts at 0 or 100, what's important is that all the guages read the same value for the same level of vacuum.Therefore, in this argument, I side with Daviee.
ok so this controversial thread rears its ugly head again but on a positive notemy gran (bless her) handed me cash on the deal that i only used it on something for my garage and to enhance my side businessdeal i thought so a new set of sockets and a CARBTUNE later i had some work ahead of mefirst test came with all kinds of trouble and i knew i had big problemshttps://youtu.be/COCTPbbPHeEafter some work i found the problem and someone either cocked up earlier in its life or the fazer has a self moving springhttps://youtu.be/Yh-vl43DTSAwhatever balancing tool you have or are going to get, first buy some extra long screwdrivers it will make your life so much easier - mine just arrived today so i will do it again at some point as i will have better ability to adjust but things are much better now- this is definatly a worthwile job doing because things are so much better now